SIST EN IEC 61558-2-10:2024

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V

This part of IEC 61558 deals with the safety of separating transformers with high insulation
level and separating transformers with output voltages exceeding 1 000 V. Transformers
incorporating electronic circuits are also covered by this document.
NOTE 1 Safety includes electrical, thermal and mechanical aspects.
Unless otherwise specified, from here onward, the term transformer covers separating
transformers with high insulation level and separating transformers with output voltages
exceeding 1 000 V AC or 1 500 V DC.
This document is applicable to stationary or portable, single-phase or polyphase, air-cooled
(natural or forced) independent or associated dry-type transformers. The windings can be
encapsulated or non-encapsulated.
For power supply units (linear) this document is applicable. For switch mode power supply
units, IEC 61558-2-16 is applicable together with this document. Where two requirements are
in conflict, the most severe takes precedence.
The rated supply voltage does not exceed 1 000 V AC, and the rated supply frequency and
the internal operating frequencies do not exceed 500 Hz.
The rated output does not exceed:
– 25 kVA for single-phase transformers;
– 40 kVA for polyphase transformers.
This document is applicable to transformers without limitation of the rated output subject to
an agreement between the purchaser and the manufacturer.
Where applicable the no-load output voltage or the rated output voltage:
– does not exceed 1 000 V AC or 1 500 V DC for separating transformers with high
insulation level;
– does exceed 1 000 V AC or 1 500 V DC and does not exceed 15 000 V AC or 15 000 V
DC for separating transformers with output voltage exceeding 1 000 V.
This document does not apply to:
– transformers covered by IEC 60076-11;
– neon transformers covered by IEC 61050; and
– power supplies and converters for use with or in products according to IEC 61347-2-10.
This document is not applicable to external circuits and their components intended to be
connected to the input terminals and output terminals of the transformers.
NOTE 2 Transformers covered by this document are used only in applications where double or reinforced
insulation between circuits is not required by the installation rules or by the end product standard.
NOTE 3 Normally, the transformers are intended to be used with equipment to provide voltages different from the
supply voltage for the functional requirements of the equipment. The protection against electric shock can be
provided (or completed) by other features of the equipment, such as the body. Parts of output circuits can be
connected to the input circuits or to protective earthing.
This document is applicable to transformers associated with specific equipment, to the extent
decided upon by the relevant IEC technical committees.
Attention is drawn to the following if necessary:
– for transformers intended to be used in vehicles, on board ships, and aircraft, additional
requirements (from other applicable standards, national rules, etc.);
– measures to protect the enclosure and the components inside the enclosure against
external influences such as fungus, vermin, termites, solar-radiation, and icing;
– the different conditions for transportation, storage, and operation of the transformers;
– additional requirements in accordance with other appropriate standards and national
rules can be applicable to transformers intended for use in special environments.
It is possible that future technological development of transformers will require an increase in
the upper limit of the frequencies. Until then this document can be used as a guidance document.
This group safety publication focusing on safety guidance is primarily intended to be used as a
product safety standard for the products mentioned in the scope, but is also intended to be used
by technical committees in the preparation of publications for products similar to those
mentioned in th

Sicherheit von Transformatoren, Netzgeräten, Drosseln und dergleichen - Teil 2-10: Besondere Anforderungen und Prüfungen an Netztransformatoren mit hohem Isolationspegel und Netztransformatoren mit Ausgangsspannungen über 1 000 V

Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Partie 2-10: Règles particulières et essais pour les transformateurs d'isolement à enroulements séparés à niveau d'isolement élevé et pour les transformateurs d'isolement à enroulements séparés à tensions secondaires supérieures à 1 000 V

L'IEC 61558-2-10:2024 est disponible sous forme de IEC 61558-2-10:2024 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 61558-2-10:2024 traite de la sécurité des transformateurs d'isolement à enroulements séparés à niveau d'isolement élevé et des transformateurs d'isolement à enroulements séparés à tensions secondaires supérieures à 1 000 V. Les transformateurs qui incorporent des circuits électroniques sont également couverts par le présent document. Cette seconde édition annule et remplace la première édition parue en 2014. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) la structure et les références ont été alignées sur l'IEC 61558-1:2017;
b) les catégories de surtension I, II, III et IV pour les essais de rigidité diélectrique et les distances d'isolement ont été ajoutées;
c) les distances d'isolement relatives aux conditions de champs homogènes ont été supprimées.
Il a le statut de publication groupée de sécurité conformément au Guide 104 de l'IEC.

Varnost transformatorjev, dušilk, napajalnikov in njihovih kombinacij - 2-10. del: Posebne zahteve in preskusi za ločilne transformatorje z visoko izolacijsko stopnjo in ločilne transformatorje z izhodnimi napetostmi nad 1000 V

Ta del standarda IEC 61558 obravnava varnost ločilnih transformatorjev z visoko izolacijsko stopnjo in ločilnih transformatorjev z izhodnimi napetostmi nad 1000 V. V tem dokumentu so zajeti tudi transformatorji z vgrajenimi elektronskimi vezji.
OPOMBA 1: Varnost vključuje električne, toplotne in mehanske vidike.
Če ni navedeno drugače, izraz »transformator« zajema ločilne transformatorje z visoko izolacijsko stopnjo in ločilne transformatorje z izhodnimi napetostmi nad 1000 V pri izmeničnem toku oziroma 1500 V pri enosmernem toku.
Ta dokument se uporablja za stacionarne ali prenosne, eno- ali večfazne, zračno hlajene (naravno ali umetno) neodvisne ali povezane suhe transformatorje. Navitja so lahko enkapsulirana ali neenkapsulirana.
Za linearne napajalnike se uporablja ta dokument. Za stikalne napajalnike se uporablja standard IEC 61558-2-16 v kombinaciji s tem dokumentom. Če sta zahtevi v nasprotju ena z drugo, prevlada natančnejša.
Nazivna napajalna napetost ne presega 1000 V pri izmeničnem toku, nazivna napajalna frekvenca in notranja obratovalna frekvenca pa ne presegata 500 Hz.
Nazivna izhodna moč ne presega:
– 25 kVA za enofazne transformatorje;
– 40 kVA za večfazne transformatorje.
Ta dokument se uporablja za transformatorje brez omejitev nazivne izhodne moči,
o čemer se dogovorita kupec in proizvajalec.
Kjer je to primerno, izhodna napetost brez obremenitve ali nazivna izhodna napetost:
– ne presega 1000 V pri izmeničnem toku oziroma 1500 V pri enosmernem toku za ločilne transformatorje z visoko izolacijsko stopnjo;
– presega 1000 V pri izmeničnem toku oziroma 1500 V pri enosmernem toku in ne presega 15.000 V pri izmeničnem toku oziroma 15.000 V pri enosmernem toku
za ločilne transformatorje z izhodnimi napetostmi nad 1000 V.
Ta dokument se ne uporablja za:
– transformatorje iz standarda IEC 60076-11;
– neonske transformatorje iz standarda IEC 61050; ter
– napajalnike in pretvornike za uporabo z izdelki ali v izdelkih v skladu s standardom IEC 61347-2-10.
Ta dokument se ne uporablja za zunanja vezja in njihove sestavne dele, ki so namenjeni za povezavo z vhodnimi in izhodnimi priključki transformatorjev.
OPOMBA 2: Transformatorji, obravnavani v tem dokumentu, se uporabljajo samo, kadar v skladu s pravili namestitve ali standardom končnega izdelka ni potrebna dvojna ali okrepljena izolacija med vezji.
OPOMBA 3: Običajno so transformatorji namenjeni uporabi z opremo za zagotovitev napetosti, ki se razlikuje od napajalne napetosti zaradi funkcionalnih razlogov. Zaščito pred električnim udarom je mogoče zagotoviti (ali dopolniti) z drugimi elementi opreme, npr. z osrednjim delom. Dele izhodnih vezij je mogoče povezati z vhodnimi vezji ali zaščitno ozemljitvijo.
Ta dokument se uporablja za transformatorje, povezane z določeno opremo, v obsegu, kot ga določijo ustrezni tehnični odbori IEC.
Po potrebi se upošteva naslednje:
– dodatne zahteve za transformatorje, namenjene uporabi v vozilih, na krovih ladij in v zračnih plovilih (iz drugih ustreznih standardov, nacionalnih predpisov itd.);
– ukrepi za zaščito ohišja in komponent v ohišju proti zunanjim vplivom, kot so glive, mrčes, termiti, sončno sevanje in zaledenitev;
– različni pogoji glede prevoza, hrambe in delovanja transformatorjev;
– dodatne zahteve v skladu z drugimi ustreznimi standardi in nacionalnimi predpisi za transformatorje, namenjene uporabi v posebnih okoljih.
Za prihodnji tehnološki razvoj transformatorjev bo morda treba zvišati zgornjo mejo frekvenc, dotlej pa je mogoče ta dokument uporabljati kot navodilo.

General Information

• Status: Published
• Public Enquiry End Date: 30-Jan-2023
• Publication Date: 26-Aug-2024
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: I96 - Imaginarni 96
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 07-Aug-2024
• Due Date: 12-Oct-2024
• Completion Date: 27-Aug-2024
• Ref Project: EN IEC 61558-2-10:2024 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V

Relations

• Revised: SIST EN 61558-2-10:2014 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1000 V
• Effective Date: 26-Jul-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2024
Varnost transformatorjev, dušilk, napajalnikov in njihovih kombinacij - 2-10. del:
Posebne zahteve in preskusi za ločilne transformatorje z visoko izolacijsko
stopnjo in ločilne transformatorje z izhodnimi napetostmi nad 1000 V
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-
10: Particular requirements and tests for separating transformers with high insulation
level and separating transformers with output voltages exceeding 1 000 V
Sicherheit von Transformatoren, Netzgeräten, Drosseln und dergleichen - Teil 2-10:
Besondere Anforderungen und Prüfungen an Netztransformatoren mit hohem
Isolationspegel und Netztransformatoren mit Ausgangsspannungen über 1 000 V
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des
combinaisons de ces éléments - Partie 2-10: Règles particulières et essais pour les
transformateurs d'isolement à enroulements séparés à niveau d'isolement élevé et pour
les transformateurs d'isolement à enroulements séparés à tensions secondaires
supérieures à 1 000 V
Ta slovenski standard je istoveten z: EN IEC 61558-2-10:2024
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61558-2-10

NORME EUROPÉENNE
EUROPÄISCHE NORM July 2024
ICS 29.180 Supersedes EN 61558-2-10:2014
English Version
Safety of transformers, reactors, power supply units and
combinations thereof - Part 2-10: Particular requirements and
tests for separating transformers with high insulation level and
separating transformers with output voltages exceeding 1 000 V
(IEC 61558-2-10:2024)
Sécurité des transformateurs, bobines d'inductance, blocs Sicherheit von Transformatoren, Drosseln, Netzgeräten und
d'alimentation et des combinaisons de ces éléments - entsprechenden Kombinationen - Teil 2-10: Besondere
Partie 2-10 : Exigences particulières et essais pour les Anforderungen und Prüfungen für Netztransformatoren mit
transformateurs d'isolement à enroulements séparés à hohem Isolationspegel und Netztransformatoren mit
niveau d'isolement élevé et pour les transformateurs Ausgangsspannungen über 1 000 V
d'isolement à enroulements séparés à tensions secondaires (IEC 61558-2-10:2024)
supérieures à 1 000 V
(IEC 61558-2-10:2024)
This European Standard was approved by CENELEC on 2024-07-12. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61558-2-10:2024 E

European foreword
The text of document 96/589/FDIS, future edition 2 of IEC 61558-2-10, prepared by IEC/TC 96
"Transformers, reactors, power supply units, and combinations thereof" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 61558-2-10:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-04-12
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-07-12
document have to be withdrawn
This document supersedes EN 61558-2-10:2014 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61558-2-10:2024 was approved by CENELEC as a
European Standard without any modification.
The endorsement notice of EN IEC 61558-1:2019 applies, except as follows.
Addition:
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60076-11:2018 NOTE Approved as EN IEC 60076-11:2018 (not modified)
IEC 60204-1:2016 NOTE Approved as EN 60204-1:2018
IEC 61050:1991 NOTE Approved as EN 61050:1992
IEC 61050:1991/A1:1994 NOTE Approved as EN 61050:1992/A1:1995
IEC 61347-2-10:2000 NOTE Approved as EN 61347-2-10:2001 (not modified)
IEC 61347-2-
NOTE Approved as EN 61347-2-10:2001/A1:2009 (not modified)
10:2000/A1:2008
IEC 61558 series NOTE Approved as EN 61558 series
IEC 61558-2-16:2021 NOTE Approved as EN IEC 61558-2-16:— (not modified)
IEC 62477-1:2022 NOTE Approved as EN IEC 62477-1:2023 (not modified)

to be published, Stage at the time of publication: FprEN IEC 61558-2-16:2021.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Annex ZA of EN IEC 61558-1:2019 applies, except as follows.
Addition:
Publication Year Title EN/HD Year
IEC 61558-1 2017 Safety of transformers, reactors, power EN IEC 61558-1 2019
supply units and combinations thereof -
Part 1: General requirements and tests

IEC 61558-2-10 ®
Edition 2.0 2024-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP ENERGY EFFICIENCY PUBLICATION

PUBLICATION GROUPÉE SUR L'EFFICACITÉ ÉNERGÉTIQUE

Safety of transformers, reactors, power supply units and combinations thereof –

Part 2-10: Particular requirements and tests for separating transformers with

high insulation level and separating transformers with output voltages

exceeding 1 000 V
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des

combinaisons de ces éléments –

Partie 2-10 : Exigences particulières et essais pour les transformateurs

d'isolement à enroulements séparés à niveau d'isolement élevé et pour les

transformateurs d'isolement à enroulements séparés à tensions secondaires

supérieures à 1 000 V
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180  ISBN 978-2-8322-8863-4

– 2 – IEC 61558-2-10:2024  IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 7
4 General requirements . 8
5 General notes on tests . 8
6 Ratings . 8
7 Classification . 9
8 Marking and other information . 9
9 Protection against electric shock . 10
10 Change of input voltage setting . 11
11 Output voltage and output current under load . 11
12 No-load output voltage . 11
13 Short-circuit voltage . 12
14 Heating . 12
15 Short-circuit and overload protection . 12
16 Mechanical strength . 12
17 Protection against harmful ingress of dust, solid objects and moisture . 12
18 Insulation resistance, dielectric strength and leakage current . 12
19 Construction . 13
20 Components . 14
21 Internal wiring . 14
22 Supply connection and other external flexible cables or cords . 14
23 Terminals for external conductors . 14
24 Provisions for protective earthing. 14
25 Screws and connections . 15
26 Creepage distances, clearances and distances through insulation . 15
27 Resistance to heat, fire and tracking . 16
28 Resistance to rusting . 16
Annexes . 17
Bibliography . 18

Table 101 – Symbols indicating the kind of transformer . 10
Table 102 – Output voltage difference . 12
Table 103 – Table of dielectric strength test voltages for working voltages above
1 000 V . 13
Table 104 – Minimum clearances in air up to 2 000 m above sea level. 15
Table 105 – Minimum creepage distances for basic or supplementary insulation. 16

IEC 61558-2-10:2024  IEC 2024 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATIONS THEREOF –

Part 2-10: Particular requirements and tests for separating
transformers with high insulation level and separating
transformers with output voltages exceeding 1 000 V

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter
...